Viết kết quả dưới dạng lũy thừa: 43 . 37 . 126 . 93 . 82
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a, 8 2 . 32 4 = 2 3 2 . 2 5 4 = 2 3 . 2 . 2 5 . 4 = 2 6 . 2 20 = 2 6 + 20 = 2 26
b, 27 4 . 9 3 . 243 = 3 3 4 . 3 2 3 . 3 5 = 3 3 . 4 . 3 2 . 3 . 3 5 = 3 12 . 3 6 . 3 5 = 3 12 + 6 + 5 = 3 23
c, 13 2 - 12 2 = 169 - 144 = 25 = 5 2
d, 6 2 + 8 2 = 36 + 64 = 100 = 10 2
e, 5 3 + 5 4 + 125 2 . 5 3 = 5 3 + 5 4 + 5 3 . 2 . 5 3 = 5 3 + 5 4 + 5 6 . 5 3 = 5 3 . 1 + 5 + 5 3 . 5 3 = 5 6 . 131
f, 1 3 + 2 3 + 3 3 + 4 3 + 5 3 = 1 + 8 + 27 + 64 + 125 = 225 = 15 2
\(2^{13}.4^5.8^2=2^{13}.\left(2^2\right)^5.\left(2^3\right)^2=2^{13}.2^{10}.2^6=2^{29}\)
`@` `\text {Ans}`
`\downarrow`
`a)`
\(2^{13}\cdot4^5\cdot8^2\)
`=`\(2^{13}\cdot\left(2^2\right)^5\cdot\left(2^3\right)^2\)
`=`\(2^{13}\cdot2^{10}\cdot2^6\)
`=`\(2^{29}\)
`b)`
\(100^6. 1000^4. 1000000\)\(33\)
`=`\(10^{12}\cdot10^{12}\cdot10^{198}=10^{222}\)
`c)`
\(24^5. 6^5. 8^8\)
`=`\(2^{15}\cdot3^5\cdot2^5\cdot3^5\cdot2^{24}\)
`=`\(2^{15+5+24}\cdot3^{5+5}\)
`=`\(2^{44}\cdot3^{10}\)
a, \(2^{13}\cdot4^5\cdot8^2=2^{13}\cdot2^{10}\cdot2^6=2^{19}.\)
b, \(100^6\cdot1000^4\cdot1000000^{33}=10^{12}\cdot10^{12}\cdot10^{198}=10^{222}.\)
c, \(24^5\cdot6^5\cdot8^8=2^{15}\cdot3^5\cdot2^5\cdot3^5\cdot2^{24}=2^{44}\cdot3^{10}.\)
a) \(9^3\cdot3^2\)
\(=\left(3^2\right)^3\cdot3^2\)
\(=3^6\cdot3^2\)
\(=3^8\)
b) \(x^7\cdot x:x^4\)
\(=x^8:x^4\)
\(=x^4\)
c) \(7\cdot3^9+3^{10}+51\cdot3^8\)
\(=3^8\cdot\left(7\cdot3+3^2+51\right)\)
\(=3^8\cdot81\)
\(=3^8\cdot3^4\)
\(=3^{12}\)
d) \(5^{15}\cdot125^3\cdot625\)
\(=5^{15}\cdot5^9\cdot5^4\)
\(=5^{28}\)
a) 6 2010 : 6 10 = 6 2000
b) ( 3 8 . 3 16 ) : ( 3 7 . 3 14 ) = 3 24 : 3 21 = 3 3
c) ( 2 26 : 2 10 ) : ( 2 18 : 2 16 ) = 2 16 : 2 2 = 2 14
d) 25 3 : 125 = ( 25 . 25 . 25 ) : 5 3 = 5 6 : 5 3 = 5 3
ta có : \(4^3.3^7.12^6.9^3.8^2=\left(2^2\right)^3.3^7.\left(2^2.3\right)^6.\left(3^2\right)^3.\left(2^3\right)^2\)
= \(2^6.3^7.2^{12}.3^6.3^6.2^6=2^{24}.3^{19}\)
\(4^3.3^7.12^6.9^3.8^2=2^6.3^7.2^{12}.3^6.3^6.2^6=2^{24}.3^{19}\)
Đề này là chịu rồi